In December 2025, the plummeting AQI led to emergency-level restrictions, called GRAP-4, being implemented in which city of India?
Delhi
GRAP (Graded Response Action Plan) is the set of emergency anti-pollution measures applied in the National Capital Region according to the Air Quality Index.
Stage IV (GRAP-4) is the “severe+” stage, invoked when the AQI crosses 450; it bans entry of non-essential trucks, halts construction and can shift schools and offices to online or hybrid mode.
In December 2025 the AQI in Delhi plunged to severe levels, and the Commission for Air Quality Management enforced GRAP-4 restrictions in Delhi-NCR.
Hence, Delhi.
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List-I
(Period)List-II
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